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  •  » Question regarding cobra rear disc brackets

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    7/20/2013 11:36 PM  #1

    50 Proof
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    Registered: 5/12/2013
    Posts: 20

    Question regarding cobra rear disc brackets

    Hello,
    I purchased the cobra rear disc conversion brackets for my '65 mustang not too long ago and I'm installing them but I have a question.  I believe the drum brakes use a gasket between the drum brake backing plate and the axle tube flange and another gasket between the plate that bolts the axle down and the drum brake backing plate.  Are any gaskets needed between the rear disc brake bracket and the axle tube?

    Last edited by 50 Proof (7/20/2013 11:53 PM)

     

    7/21/2013 5:32 AM  #2

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,488

    Re: Question regarding cobra rear disc brackets

    The depth of the bearing pocket on the bracket is designed to precisely fit the bearing's protrusion from the housing.  If you add a gasket there, you are also deepening that pocket, making for possible axle movement.  That doesn't matter much with drum brakes but with discs it can cause vibration.

    If you feel the need to have a gasket there, use a very thin coat of RTV.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    7/21/2013 9:31 AM  #3

    50 Proof
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    Re: Question regarding cobra rear disc brackets

    Thank you for the reply.  I just wanted to make sure I'm not doing anything wrong.

       •Thread Starter
     

    12/26/2016 8:21 PM  #4

    Chaplin
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    Registered: 3/14/2015
    Posts: 1,027

    Re: Question regarding cobra rear disc brackets

    MS wrote:

    The depth of the bearing pocket on the bracket is designed to precisely fit the bearing's protrusion from the housing.  If you add a gasket there, you are also deepening that pocket, making for possible axle movement.  That doesn't matter much with drum brakes but with discs it can cause vibration.

    If you feel the need to have a gasket there, use a very thin coat of RTV.

     

    Hi-
    I will be installing my rear brackets this week and had the same question as the OP.  Just want to make sure that the thinking is still no gasket.

    Thanks!

     

    12/26/2016 8:44 PM  #5

    50 Proof
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    Re: Question regarding cobra rear disc brackets

    I assembled it all with no gaskets. I've yet to drive the car because it's been a slow project so I can't speak for how it functions just yet. I don't see a reason to run any gaskets though.

       •Thread Starter
     

    12/27/2016 8:17 AM  #6

    ultrastang
    I FYI 24-7

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    From: Camden, Arkansas
    Registered: 4/01/2013
    Posts: 570

    Re: Question regarding cobra rear disc brackets

    The purpose for the gaskets isn't to seal in any fluids but is there to seal out small particles of brake dust from getting into the axle bearings.

     

    12/27/2016 1:03 PM  #7

    Chaplin
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    Re: Question regarding cobra rear disc brackets

    Well, I just pulled my axles from my brand new Strange rear end it did not have any gaskets.  So, I guess even Strange agrees that they're not necessary.

     

    12/27/2016 1:53 PM  #8

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,488

    Re: Question regarding cobra rear disc brackets

    Since there is a HUGE HOLE where the axle sticks through the bracket, I cannot figure why a gasket would be used.  It sure isn't keeping anything IN or OUT.  Only reason I can think of would be to seal two surfaces that could possibly rust.  RTV will do that fine.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    12/27/2016 2:47 PM  #9

    ultrastang
    I FYI 24-7

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    From: Camden, Arkansas
    Registered: 4/01/2013
    Posts: 570

    Re: Question regarding cobra rear disc brackets

    In the original application, drum brakes would have been installed and gaskets placed on either side of the backing plate. The gaskets were to prevent brake dust particles from getting into the axle bearings.

    Last edited by ultrastang (12/27/2016 2:48 PM)

     

     

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